Up to 40% of northeastern Asians experience flushing and elevated heart rate after drinking even minimal amounts of alcohol, due to accumulation of acetaldehyde. This is because of a mutation in acetaldehyde dehydrogenase (ALDH2), the enzyme that converts acetaldehyde to acetate.
When you use Outlook, the operating system saves your files in the \Documents and Settings\ directory for your user name. This directory saves some user-specific configurations, including the contact files used in your Outlook installation. Each Outlook file can be identified by its extension. Contacts are saved with the \.pab\ file extension.
A file extension is the set of three or four characters at the end of a filename; in this case, .vcs. File extensions tell you what type of file it is, and tell Windows what programs can open it. Windows often associates a default program to each file extension, so that when you double-click the file, the program launches automatically.